PHOENIX (AP) - Supporters of a proposed Arizona ballot initiative for a 1-cent sales tax increase say they're preparing to file more than 260,000 signatures to put the measure on the November ballot.

The so-called Quality Education and Jobs campaign says they obtained voter signatures from all 15 Arizona counties.

A minimum of 172,809 valid signatures are required by the July 5 deadline. Campaign chairperson Ann-Eve Pedersen says organizers will do a final validity check before submitting the petitions.

The campaign also has retained retired Arizona Supreme Court Justice Stanley Feldman in case there's a legal challenge to the petitions.

Money raised by the 1-cent sales tax increase would be directed to education, health care and other state services.

The increase would take effect after a previously approved temporary increase expires in mid-2013.